maths

if (x + 3)(x -2) = 1

show that x^2 + x -7 = 0

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  1. Multiply out the (x + 3)(x -2), giving you

    x^2 +x -6 = 1 ,

    and then subtract 1 from both sides of that equation. You will get you the equation that you want to prove.

    That proves it is true

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  2. thanks

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